Question

The welding operation is performed on an aluminum-alloy plate of length 200 mm with
voltage of 20 volts and current of 150 A. The weld bead is in the form of triangular cross-
section with base of 10 mm and the height of 5 mm. The electrode is made up of Aluminum
which requires 2.9 J/mm' of specific energy. Calculate the welding speed. Assume the
melting efficiency is 70%.
a) 40 mm/s
b) 20 mm/s
c) 28.96 mm/s
d) 30.58 mm/s
1​

Answer 1

Explanation:

The answer is d) Ithink

Answer 2

Answer:

c

Explanation:

V=e(VI/uA)

(A=1/2 bh)

=0.5X10X5

=25mm2)

=0.7((20X150)/(2.9X25))

=28.96mm/s